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Cornerstone · Grades 3–5 Keystones #1 20 January 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 20 January 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 7⁄9 + 1⁄9

    Answer: 8⁄9
  2. 2. Algebra Two-step equations

    Solve: 2x + 6 = 26

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Share 35 in the ratio 3:2

    Answer: 21 and 14
  5. 5. Statistics Mean

    Find the mean of: 2, 3, 19

    Answer: 8

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